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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '060245dcca06b6009b20773b35f17c3611bfa64957565c2acf24836bff1ccbf5' 
  AND token = 'QIcJTTYpdD7b5rTD5TQyu9jW5BXlThfEwcvFlEP3muw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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