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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02a8c0f21d7a2b9c3d5e2ed5932412d07ce2b4ad61fe657e2aec69eb7c979831' 
  AND token = 'TyZxppG/EB81wc699QdW9CsJhcQwTTn5j/LJZCnUY/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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