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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22164c9eda566d482df1a1ac73dd21750187920872c21b1270b8ffabfedcec75' 
  AND token = '/a154/5xea2dhKIxBGd3Xy7JdXNZfLHp0XozJYQ+KWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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