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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cca1b4a8a89b642f163c46100d02574b39ee9a039ed5a42277c80fabd12b59ad' 
  AND token = 'o1A+X18kSzwZBT2HJakPdYsaZkkFNwKGfF/1AtsgusI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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