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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '625a18fd47838b4544afd423b2b256ae8c822f66b31461506c8ca5627b16b603' 
  AND token = 'e91Ky9Ws5E1tqZtkXwPj1NDVVK8oOZV/K2SEgDdsmQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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