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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fa142d57feb301273b0d3f8da1a7374b1c229131a844f5e1323c98a2d09a37ce' 
  AND token = 'b4NyUnNBhuxbFLU+tmMHLx76EOJvAmWdbkTuqo7N6C0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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