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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9629608abfc4ff48a4ef268fe529d458cff63ecea4546ae8ab996abcc75ae48' 
  AND token = 'Wu+pc7nNf964ftfK9PQBb65kHnF74VJVciYBqkKHiTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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