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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed35bf61b9b625cae92b96f4a175d68cd1173f04f9212738ccef65637a2b8db2' 
  AND token = 'Jn+6G14VL0Bc56AbPqnyu+YdHwOuhWS73mPmI3MUC6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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