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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e14ea6c2b9addfa2c23e8a8e402572dde34b185c82a51657fa3daf19bab31fe8' 
  AND token = 'ue7ZWEQ2BHyMhiNoYBiIvkV6LNz7ICi7qBMI0YfDrWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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