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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01385a8662adb17b9c9ee51f5c79e056be9e364768e8b3ac8806b09b1df6264e' 
  AND token = '1NEM5YAPFkxrgYyiDtbcshb2KKuT4XgvmkHKHCJANRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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