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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faffb035a889c97bdb313a800b5ba790310e6ad894efa0d725bab03777acb240' 
  AND token = 'jqqgL+rEUqz8nlx1Aw5ZP6DUa2HNNGqxyAnbJf9BCkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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