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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccebcdc4e3f7eac5b39ee63fca154fc9f196d41f9bff3efd5aba0c9bfa33642c' 
  AND token = 'B8A3ES8N2Nex46sQ6brFKIS4NYSb08af78IrHgMY7J4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}