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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11cbeb3d0375993149fd73e0d8991669d48537d5c974db6670f7558737bfb95c' 
  AND token = 'i2E+/THSjD3Rk3fGjPc+0ENJD9ndUgF9NFWuZDDrT0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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