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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c44f09e51a3e8ec4fd662aeb040f157f88fd351295db684f7aac772c1299fd7e' 
  AND token = 'BaWCdPV+7d0tBsnrNQwB7XxDV2tFTYFHHyw26os0Jsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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