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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92d66f9b460def0e9b569598458c1b3fc69b3e7777385af8f34f00ecd0e2c78e' 
  AND token = 'Q7NacyKYEyAKJOTRXGqn4ssBfy93oJqJzTnULMDv4og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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