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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b773f0ee2bac5065c7ee4b69457b5a2805ba6db3da5176b89ba7f94e8e43177' 
  AND token = 'Dv/hzOSydDN7nrO4TyxX3eKVuUiZ8ZOTcgQIH2zyROc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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