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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f10231c65ab50a7791e5ca2873491f7f464bac16adbf3620b397b9d42ed16992' 
  AND token = 'T6yozrXjG8Vw/r8C26tILxIVfbgqYcIfqHDoxi6XE3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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