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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ee15ccd065040a6f0bcbcb0e6668341ced07a66ffc743b274bafe685aa9eb85' 
  AND token = 'EFoV3pgL6et8VF/GNSEv+Byvx0KEYQz0NO3pNO+A0Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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