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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '158c9a93cae992f55708c302ab6f14d9317e853b42fba0644eb1511f04f69cc0' 
  AND token = 'WaGSKqOOeNuegqE5VVG0rsW4Q+2RkK2HL0rGkWluLe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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