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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5898e35c4fe138ee43e69b2c0c325c2addd5dceda941ec6da356bd045d436807' 
  AND token = 'GPeswhmfWnen/5w7pfOJnPTUygAlw1bHzpPAb+boBy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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