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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41ed56e60bf42edbfc38420318555d1ce4f57620c3bf03853dd1e2ff52b387ca' 
  AND token = '/bZKOYvsKmu1coQ0Mi5Q1Jf6g+lEX77drVrTAY656no=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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