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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25fe7c05998c3f0259f8ba2f068cd6fd80a92cb83228d0f5929e05cd130d6f11' 
  AND token = '5Vn7C7GZPJWC/MUmchztaSbUzBZnGgssNVf2m2nwPF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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