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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a0f059060173426d1dba407ad465c9c69a86f6cedf85142ff9148fb39bf8315' 
  AND token = 'YlN3bmIPnQFbT0nduGsnU7vn1jlor0gnIHrQPi2hNc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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