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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0890ad6e64e0606043f40dabb718192fb13772f5f6db4c928acddd05e76a1fcb' 
  AND token = 'U5lqItxuunoxbxI0OZk7fNlk3fyxXx9dwqV2z/trQlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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