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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd98bfa2c57488da545198cd523f3856dfb388f00a0e740077a9d5f912e86f3e2' 
  AND token = 'ap4gKpdnces9Y9a5yy5tvbtiRFSc7N22OPv19W6TsYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}