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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2267fbf395121bc2a256c585e13341ac6a784f22a95fac47458354e0fdb5b70f' 
  AND token = 'lf2JfrU5Pv1lAt9NWMY1G4YSqI65xgSUg7irOnwrn7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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