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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e276a8497438c6a6e868ad0479f91d9c80262fbc504408d3330c9920ea72fce' 
  AND token = 'Woimjr00w5FIQLmh63w9YRabfHI3Xn5Z1NpmWI0We6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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