SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '967d50a6d078d389ab41246a584bac348b0c6e4c86e329272ce072b4f73a94b9' 
  AND token = 'xq5FUAUKGyxiQ/0WifIxPFwN2oXcuQWg/pCfhpJSOm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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