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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd65872e749f4be60fd629e8de5d398aa448291fc431adefcb9a8b0ef10357aca' 
  AND token = '8l02ZRL4++4Dkl3a6QucXKNW6O0ku6cYqDSqnQ7b8vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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