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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b1a6764b5a97a897dd98b6e4405d849c6be562d685b00e4a1621e4d8eb33b30' 
  AND token = 'cVvtVE2S4VCHL/ecA/4e3WMr9Gp1Wh2++2T/iDIEVkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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