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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec46de439724ad44258e1f133143685de5eb6b4e86909e0c57c517b9d026cc04' 
  AND token = '1rR/NW7ogrJ0wDlEb1Dof/98a+/xYeJC20bmH0r53+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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