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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d23ce6fc80b893e8810eac460b82471142b0119f414320967a4e89d0998abb7' 
  AND token = 'nr04uhw9UaEUTRf232WUyRyIh/DuVbc56V2x0D3ljUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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