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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11761999a96967f79d8a7f2a426fdd987053a3794f31b1fd8a164dc3ecbb5dc5' 
  AND token = 'DzD/XGP0bh0smhJoPwtyY8fl1pTdylE0rPp8woQa44c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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