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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38d3a9b2ed7bc2b505e7b6e6c9c9f29bcad3ce2d799c81b115d26647a521ea78' 
  AND token = 'Tw0bTHfgSCH9AGpYA8b4m4JoINIbQSDf/smAgRBBi+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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