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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a6610ddc081a9ac84c7e92754a196cfc0bf896c9ec8778cdb2536cbad770da2' 
  AND token = 'N5Ne9LBpgOh7382gMMIhp2DfQMBisinhoa9Bq3TbfLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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