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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea62d3d80a324ce6f9bc0a6d2cf60973c675809f3d53b1c4dae7d101ba97d5c7' 
  AND token = 'LVV2OL7xKZOMd55oEuLYIetta69ktS12vFtwrko9dGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}