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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e383c29e6dd5d9c3489f8926502a9b2e7e7b443a5bfeab9680b0bc330f31ac4' 
  AND token = 'w9HUvw3wscsaIlHv5WkDew08LKi5Xl6YzLNK10+ROJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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