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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecaba9b0b3239d730be7b45c84d5b465e6bd5becfc2106589cd8c6bbf10f14db' 
  AND token = 'jRzTyHF2h/2vqOx4O88JThEBJq4ZpVLOkS3proeZeAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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