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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7c61907dabaaf55c776cc525ed6bec4828bf84d15c1f9e7913b5c00f3fda21e' 
  AND token = '3TCyBnwhqp4XYlKOIicSxbQy4PWt5tyngqtVLxZI92k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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