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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a0aee2c8c335a8ca22ea14e07e3e62bcc27519fe2815c79a2439a42193f8079d' 
  AND token = 'HPmWpeW9tN54WhYWU+OOjwcpNaLXy9Tys5l6MWfZBvo=' 
  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"
    }
  }
}