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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89207c1c25e4070edb9b59f9da1c1398673e056b803aca77dec355f9fe7fa176' 
  AND token = 'M+wClKEb9wsG4yYuA2d5OfNM7LQz5PhboHVyJfhzQdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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