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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6cc02c073ecbb05973b618c99306c74f4b44be7898204b3eb248076aa86dc580' 
  AND token = 'KLLIvdaWv1Zd3P7WEqWeaZ297LSw0eKjhtSoVKkjUEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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