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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c2d2de5519e4ae4daedf6dba408e6107d3381ef41e7eb9a772c20cd24fbf85ce' 
  AND token = 'eXGpGlVUSjKdIIA2fQqzIZtzurKoFSMcOnL/kU2yMp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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