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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06d14a290d69ef2f53e9e5ce29f4221059773438947589917dcab872fec89980' 
  AND token = '9f1E8/m06G5l4+GhFbkPVYdcghGQFhaLUP/Ih51ur/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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