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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc3a688c38ce03d1b132af85370727f3b4ab8ffc91d24499e49205a1d37979a0' 
  AND token = '3chWiHeP0RwOlcriGOk/vwew5VbqNJ7S5hcKHxq75ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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