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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d9fa8dbc4700d007b9981a29fd1b77a534ad78b7e15e3d578162a95e4fe1642' 
  AND token = 'hN3ma8aeMEB12GGiZRZ4ABXY7X357y4Iv9BzJolWTB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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