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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae469b51a2d6b2fcea490f328e0c4ea1b95a61cf2c724d9bee1f2db813fd99aa' 
  AND token = 'J5WSzsijNq55KeLgTvbXy6jJ7/m1J50aQRcDynyJPls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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