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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63fc226a8430288dee5a3553ddb5523ec3148765786179cbdc26fb089d2aa313' 
  AND token = 'RveHrix2b9W3wyESYF7Tu9hGt59s06f8Some756T8P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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