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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4724b816eeb79a6a4cff45f8060e200464aabda67ca875b8b047d95ce2524666' 
  AND token = 'qYVzRQ3Dq4bSY5f5Bt0MbFpIzo+6KB///BeNGEuLVbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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