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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed924cf9b56b770e8cf30486b170a12b408aaf3e58def8eff7f7533710a6ca40' 
  AND token = '5YC5Lcklg6KVcdZ2NldSb6I2TUQi9p4CJVv7uMvmc9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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