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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '329c5ad7eb546c4ac0c5da60bbfa35cfe7dbda75d4e956c224ca5acbd407d14e' 
  AND token = 'j7WUUwEXT3BH9nLIawBNq8o6ocqA7p0VH4pAdhH7M9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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