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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06b3f49295c45a19a4ab946e87bd49a3e66f5d2f4e0c4b6d44d7f29764adaa84' 
  AND token = 'ozYCfZ/TpicP92dr7d64FlAIUSUhIhtnql1J27n4i6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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