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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f45f5f6bd2f4edf33dca5bbd5ec780b000cc7f93b943dea96c06c406b0e9add' 
  AND token = 'MwdoddIMkp4v13mr46eSOrlFt3BDki7wT2K207V863U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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