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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32de66e3aa6de14c87c465beb49dc7eda29cf65324833abceb64d4975c8aab79' 
  AND token = 'F+9yjbCmUN5OANKBmJbvqj5js3dlAE8/dkdqDQpXeNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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