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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfe073e1f92aaa41a5f5d7578edd3fb7927696c3b896a8c77b6d34409b3af77e' 
  AND token = 'GHYaW9Yw1mmnRsBRNddTV5EhCac2Zxu1n5juJyVboUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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