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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cae40a3d28c6180cf8b7ed463da2e5c1587bc7dc84889a4eafc61a0e4f64428a' 
  AND token = 'hWI5tBFotzd8xpxXJe2bMkpmfrYl6z3Ezo1jjHXV4DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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