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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5ad616381d1ca3b0fb96e9d51c46e6a953f0b13da88f4492d5a8e513352fbb7' 
  AND token = 'OAZm0Ja5cbOlbEmwyFm/DtYQF/Zx/kpnKBJsdxIlJL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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